Glass, R.(20070301). Types of Articles. In AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press. Retrieved 3 Mar. 2015, from http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-chapter-1.

Glass, Richard M. "Types of Articles." In AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press, 20070301. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-chapter-1.